PR #15693 - manaflow-ai/cmux

Continues the cmux-next deletion (plans/cmux-next/deletion.md B3, B4, B5). Net: 178,333 lines deleted, 577 added, over 1,288 files. Nothing here is linked or run by cmux-next, the bundled CLI, iOS, web or cmux-tui.

Changelog

none

Batches

Commit	Lines deleted	What
B4 resources + unlinked packages	43,038	CmuxGit, CmuxSidebarGit, CmuxNotifications, CmuxComputerUse, CmuxFeedback, CmuxUpdaterUI (no target links them; CmuxUpdater stays). Resources the bundle never ships: agent-session bundles and their build script, `cmux.sdef`, ConfigPackErrors, the cloud-agent-skill lproj copies. Info.plist drops the scripting definition, Services, the Dock tile plugin and the legacy drag UTTypes.
Docs, dogfood, tests_v2	16,672	Docs for canvas, custom sidebars, the interpreter surface and the remote-tmux mirror; the cmux-custom-sidebar skill; dogfood/scenarios and dogfood/fuzz (need bonsplit's `debug.layout`); 47 tests_v2 files whose oracles are old-app `debug.*` methods.
B5 CLI verbs	27,023	`canvas`, `simulator`/`ios`, custom `sidebar`, `right-sidebar`, `window display(s)`/`default-display`, `project`, `set-app-focus`, `simulate-app-active`, `simulate-sidebar-drag`, `debug-terminals`, `iroh-diag`, `refresh-surfaces`. cmux-next already answered all their methods with a typed unsupported error. Each public name keeps a typed error (`unsupported in cmux-next: <reason>`, exit 1) so scripts learn why. `sidebar` and `window` now go straight to the cmux-next action verbs. The CLI no longer links CmuxSimulator. The CLI string table drops 157 unreferenced keys (1,977 to 1,820).
Dead scripts	5,761	wireguard-go, bundled-resources and paste-worker builds, event-log and window benchmarks, run-tests-v2.sh, the remote-tmux fuzz tools and their lint, reload.sh's cmuxd build.
B5 package shrink	69,053	CmuxControlSocket (47.6k to 1.3k), CmuxTerminalCore (18.3k to 0.6k) and CmuxSurfaceCatalogModel (5.5k to 0.1k) keep only the client types the CLI uses. The legacy dispatch table is replaced by the one set the CLI reads (`SocketPollingMethods`).
Unreferenced files	6,271	Fixed-point scan of the CLI's shared packages: files whose types no Swift file in the repo references, plus the tests that only covered them.
B3 CI	10,614	App-host shards, lag job, layered product publish, E2E accounting, v1 socket tests, perf-activation. pr_runner_pool and late_placement now plan only compile admission and the CLI product tests, so owned capacity is no longer reserved for 7 phantom shards. Stale review-bot globs.

Also: Native/DiffSidecar/Cargo.toml no longer strips proc-macro dylibs. With the Xcode 27 SDK the stripped thiserror_impl made every local cmux-next build fail in Build Diff Sidecar. The release binary is still stripped.

Verification

./scripts/reload.sh --tag nxdel2 --no-global-cli-links succeeds after each batch and on the final merged head (cmux-tui pin f5d45a8). cmux-cli Debug builds on its own.
scripts/cmux-next/smoke-bundled-cli.sh --tag nxdel2 passes: version, help, help in 21 languages, 432 actions.
scripts/cmux-next/cli-compat-e2e.py passes 41/41, including teardown, on batches 1-2, after B5 and on the final head. The app was launched with a clean env plus TMPDIR, CMUX_NEXT_NO_ACTIVATE=1 and CMUX_NEXT_SOCKET_MODE=automation. PTYs stayed at 125.
swift build --build-tests passes in Packages/macOS/CmuxNext. swift test passes in CmuxControlSocket, CmuxTerminalCore, CmuxCore, CmuxAgentJournal, CmuxSettings and CMUXAgentLaunch.
check-no-godfiles.sh, check-concurrency.sh and check-l10n.sh pass (16 tables, 2,760 keys, 0 errors).
tests/test_cli_contract_help.py passes against the bundled CLI (211 probes). tests/test_cloud_vm_skill_coverage.py passes again; it was red since B1.
CI tool tests: 1,928 passed. The 9 failures also fail on the base.
actionlint: no new findings.
Not run: cmux-cli-tests (host-free, runs on CI; no test references a removed symbol), the iOS build (no iOS input changed), the full tests_v2 compat suite.

Decisions to check

The X1 reuse candidates without a link (Git, sidebar Git, Notifications, Computer Use, Feedback, UpdaterUI) are deleted per goal 9 (rewrite, do not port). They can be recovered from git history.
Kept, and each needs a decision: CmuxSimulator (cloud-ios.md Q3), import + CmuxTerminalImport and sudo + CmuxSudoBroker (cmux-next reads neither output), themes, the Dock docs and cmux docs dock, webviews/src/agent-session, CmuxSyncStore, daemon/ and the test_ssh_remote_* files (B6).

🤖 Generated with Claude Code

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Summary by cubic

Continues the cmux-next deletion plan (B3–B5): removes 178,333 lines of legacy resources, CLI verbs, docs, tests, and CI jobs, adding 577 lines over 1,288 files. Nothing removed is linked or run by cmux-next, the bundled CLI, iOS, web, or cmux-tui.

Refactors

Deletes unlinked packages (CmuxGit, CmuxSidebarGit, CmuxNotifications, CmuxComputerUse, CmuxFeedback, CmuxUpdaterUI), agent-session bundles, cmux.sdef, and unused Info.plist entries.
Removed CLI verbs (canvas, simulator/ios, custom/right sidebar, window display, project, app-focus and debugging verbs, iroh-diag, refresh-surfaces) keep a typed unsupported in cmux-next error (exit 1) so scripts learn why.
sidebar and window now route straight to cmux-next action verbs; the CLI no longer links CmuxSimulator and drops 157 unreferenced string keys.
CmuxControlSocket, CmuxTerminalCore, and CmuxSurfaceCatalogModel shrink to only the client types the CLI uses.
CI drops app-host shards, the lag job, layered product publish, E2E accounting, v1 socket tests, and perf-activation; owned capacity is now reserved only for compile admission and the CLI product tests.
Deletes dead docs, dogfood tours, fuzzer, 47 tests_v2 files, and build scripts (wireguard-go, bundled-resources, paste-worker, run-tests-v2.sh).
Kept but needing decisions: CmuxSimulator, import/sudo, themes, dock docs, agent-session webviews, CmuxSyncStore, daemon/, and test_ssh_remote_* (B6).

Bug Fixes

Native/DiffSidecar/Cargo.toml no longer strips proc-macro dylibs; the Xcode 27 SDK's strip broke every local cmux-next build.